prater



Ro'T'AnY VALVE. APPLICATION FILEQSEPT- 30. IBIS.

A51.1111111511 21, w. $12511. m1111111 vALvE. APPLICATION FILED SEPT. A30. |915.

titi

y maaier."

EDWIN -PRATER AND rnnn w. sisnn, or Twin FALLS, nonno.

nin.

normar unizvn provision of van internal combustion engine of this character wherein the rotary valve employed will take the by lessening the number of the working parts of the said engine and assuring a more` perfect working thereof.

Another object of the invention is the pro-A vision of an engine of this character wherein the puppet valves and springs are eliminated, thereby obviating the necessity of considerable grinding of the valves and trouble from coi'rosion of the same.

Ei. further object of the invention is' the provision of -an vengine of this character wherein the spark plug is so located that the charge is red in the center of the cylinder of theengine. y y

A still further object of the invention is the provision of an engine of this characterl wherein, in the eventof the use of a small bored cylinder and the rotary valve', the horse power thereof will he the saine as that of the usual type of engine having a larger bore cylinder and the ordinary puppet type of valve.

- A still i'urtlieriobject of the invention is the provision of an engine of this character which is extremely simple in construction, thoroughly reliable and eflioient in operation and inexpensive in inanufacture.

l/Vith these and other objects inview, the invention consists in theT construction,'coin bination and arrangement of parts as will. be hereinafter fully described, illustrated in the accompanying drawings, and out in the claiinhereunto apliended. ln the drawingszFigure l. is a vertical longitudinal sectional elevation through the engine constructed in accordance'with the ini v'ention; Fig. 2 is a fragmentary vertical sectional view taken at right angles to the section shown in Fig. 1; Fig. 3 is a sectional view on the linelLSTJof Fig. 1; Fig. l is a topI specificati@ @tieners Patent. patents@ Aug, a5, MM5, I YApplication led Septembei'3),j19l5. Serial 310.153,-14111.

to the class of rotary valve 'combustion engines. The primary object of the invention is the place of the usualpuppet valve in engines of this type, there= 'fitted a beveled v'therein the lower end of the rotary valve pointed mam I plan view; and Fig. 5 is a horizontal transverse sectional `view through :the cylinder showing the vintake andexhaust manifolds removed. Fig. Gis a plan view showing the connections between the i'otaryvalves in multiple cylinders.

Similar reference characters indicate cor- Y .responding parts 'throughout the several views of the drawings. y

Referringl to the drawings in detail, A

designates a portion of the eylinder'of the internal combustiony engine, B the piston re eiprocatingly' movable therein, C the stem of the said'pistoii,l D the crank of the driv T0 ing shaft E and F 4 the crank chamber formed by the casing Gr at one end of the cylinder which is separable therefrom, while the said casing G is made in two parts, although itmay found desirable. Surrounding the cylinder A is a water jacket H, as usual, which has communicating with its water space a water supply pipe I lleading from any suitable water cooling system. f

Mountedupon the upper end of the cylinder A is a head J having independentpassagesl in communication with the respective intake and exhaust manifolds K and L,

'while loosely'mounted centrally in the said l5 head is a spark plug M having connection with a suitable electric circuit tor the igiii- Ation of the charges when-admitted and coinpresse'd within the vcylinder A, the head-be! ing formed y communication with a water pipe O leading from thel cooling system hereinbefore de? scribed.' I

tthe-joiiitbetween 'the cylinderA and the crank casing G, interiorly thereof, is @5 formedfan annular race-way 10 vin vwhich is gear 11 which has threaded which-'comprises a cylindrical body or shell 12 which is co-extensive Withthe cylinder A 100 and snugly iitsinteriorly thereof, the outer .end being formed with an end wall 13 pro.

vided with an arcuate shaped opeiiinglt adapted for registration with the passages leading to the respectiveintake and exhaust 105 manifolds, 'the spark plug M-being tapped in the end 4wall 13 of the body or shell 1S?. of the valve, and working within the latter is the reciprocatingly movable piston B, as A ll clearly shown. y y i y Mounted on thecraixl shaft E is a drive gear 116 which meshes' wit la lcompanion gear 17 diagrammatic bottom ,te`

be otherwise constructed if 'I5 with a water space N which has to loosely j ournaled upon a stud shaft or axle V mounted in the crank casing G, and this c'ompanicm gear 17 is formed with a beveled pinion A19 which meshes with the beveled gear' 11 in the race-way 10 so that on Vthe .turning of the shaft E the valve body or shell l2 will bel rotated within the cylinder A of the engine for controlling the fuel supply and the exhaust to and from the said cylinder. Interposed between the gear 11 and the opposite walls of the race-way 10 tion at this point.

,The cylinder, head J is independent of the cylinder A and rotary valve body o r `shell 12 and is held in position by suitable fastenings set in the cylinder A, while fitted in. the end wall 13 of the valvebody/ 12 and,

working against the head end marginally of the opening 14 therein is a packing 21 and formed in the wall 13 and leading from the interior of the valve body 12 to the seat for thesaidpacking iS a vent 22 which permits tempressetl fluid to act upon the. packing 21 so asto force the samle against the head and thereby assure aiuid-tight joint about the opening 14 in the end wall r`13 of the valve bodyjor shell V12 to avoid leakage of the fluid therebetween.

In `the "operation ofthe; engine, when the piston B is moved'on the compression stroke the rotary valve body or shell 12 is positioned to close the opening in its end wall and as the said rotary` valve body isrotated a sparkIv is delivered to the vspark plug M and transmitted into thecylinder, igniting the charge which has been previously admit ted thereto from the intake manifold K through the opening 14 which is uncovered at a predetermined point in the rotation of y the valve body and thus causingthe driving of the piston B 'downwardly.' The rotary valve body 12 continues its motion and as the piston B arrives Vat about twenty-ive degrees fromathe down center the opening 14'begins to l'icover the exhaust passage so that at the completion of the upward stroke of the piston the burnt gases have been discharged and the exhaust manifold L is shut ofl" by the passing of the opening 14 in the end wall 13 of the valve body beyond the exhaust passage. The rotary valve body 12 continues its motion so that the opening 14 commences to uncover the intake manifold as the piston B starts on the down stroke, remaining open until the crank shaft is approximately ten degrees abovedown center when the said opening `is entirely closed.

. From this upward, the compression of the charge commences and ahigh degree of compression is obtained,l owing to the large volume of gas drawn into the cylinder.` The power for the Jrotation lof thevalvc is taken jdirectly from the crank shaft,v it ,being infact, are maintained ina bath of oil at all times. The gas under compression within the cylinder is forced through the vent 22 to act upon the packing 21 so as to render the joint between the head and the valve body airetight and this packing perfectly wipes the inner surface of the cyl inder head as the valve rotates.

In Fig. 6. there is shown the arrangement 7 of the rotaryfvalves for multiple cylinders, the valves in pairs being fitted with spur gears 23 meshing with each other for the driving of the rotary valves. One gear 23 of each pair is also formed with beveled gear teeth 24 for meshing engagement with?l -a'beveled pinion adapted to be driven from the crank shaft of the engine.

Afirst named cylinder and having an cxternally threaded end, a beveled gear threaded on the externally threaded end of. the inner cylinder and movable in the raceway, the said gear being formed with a ccntral opening corresponding to the size of the core in the inner cylinder, bearing balls interposed between the walls of the raceway and thel faces adjacent thereto of the gear, a piston working within the inner cylinder, a crank operating said piston and located in the crank casing, gear connections betweenI the crank and the said gear on the inner cylinder for rotating the same, inlet and ex- 110 haust pipes leading from the first named cylinder at the head thereof, a head on the inner cylinder and having openings adapted 'for alternate registration with the inlet and EDWIN r. PRATER.

FRED W, siznu.

Witnesses A AnnisoN T. SMITH, HUGH F. SMITH. 

